“Where else are you going to see the work of 25 high-caliber designers and artists in one place?” asks Denise Lamott of Muir Beach. “And nine of them are from our very own Marin County.”

Lamott, who represents the San Francisco Decorator Showcase, an annual benefit for San Francisco University High School and one of the nation’s premier design events, says these Marin designers make up nine excellent reasons to attend this year’s showcase house.

The venue, open for tours through Memorial Day, is the 6,100-square-foot Villa de Martini, constructed of concrete on a triple lot in 1929 near Coit Tower, with views of San Francisco Bay and three bridges.

Here’s a look at the Marin designers spaces.

Interiors

A countertop that looks like statuary marble but is stain-, scratch- and heat-resistant; an island countertop that looks like wood but is fashioned from forgiving resin; and custom wood-like kitchen cabinets are are maintenance-free making this space stylish but user-friendly.

• Ann Lowengart Interiors in San Anselmo designed a boho-chic girls room in vibrant pink and orange hues reminiscent of her sister’s childhood room.

“The mood of the room is just purely happy,” Lowengart says. “It’s meant to be fun, joyful, and a real reflection of my sister’s joie de vive.” Woven together are original artwork, Osborne & Little wallpaper, Robert Allen Designs fabrics, and pieces from Chairish given a new look by Revitaliste.

• Sausalito’s Nest Design Co. “perfected the idea of a shared boys and girls bedroom,” Lamott says. Jennifer Wundrow, and Heather Brock created a shared headboard as an alternative to typical bunk beds or two side-by-side beds to give children a sense of privacy and their own space. They made sure to include plenty of storage and even a rock-climbing corner. Photo Credit: Suzanna Scott

“It’s very special,” Cahan says. “We worked with a London firm that creates the finest bespoke wallpapers for this paper that celebrates the Year of the Monkey, choosing colors traditionally associated with this zodiac sign — blue, white and 22 karat gold. It’s definitely over-the-top couture,” she says.

• Gloria Marth Design in San Rafael, in its first time at Showcase, opted for a modern-meets-classic take in the elegant powder room and hallway. A refined mix of metals, a custom marble vanity, a porcelain-and-marble floor and Ted Boerner hardware, a favorite of the designer, keep the space sophisticated.

Art

• Visual artist Diane Rosenblum, in her first showing at Showcase, chose a large artwork, Gerhard Richter Painting 1989 — 2009, for her staircase space.

“It comments on the art market, incorporating what could be dry auction data into a beautiful, sophisticated and original appropriation,” she says. “Colors indicate price — green, “go;” blue, “cool, more money,” and orange/red, “hot, hot, hot.”

• Mill Valley photographer David Duncan Livingston, known for his images seen in shelter magazines, brings life to passageway walls on the upper levels with his installation, Artful Passage.

• SWA Group in Sausalito brings to life a cloud terrace and pollinator-friendly garden on the rooftop. According to designer Chih-Wei G.V. Chang, in a debut at Showcase “it’s an urban habitat on the cloud, something so beautiful and ecologically functional.”

Don’t-miss events

• The Marin Orchid Society promises even beginners can grow orchids with difficult names such as coelogyne and dendrochilum and it will show you how at 7 p.m. May 24 at 75 Lindaro St. in San Rafael. Unusual orchids available to win or buy. Questions? Call 415-895-0667 or go to www.marinorchidsociety.com.

• Enjoy light refreshments while you learn about Ethan Allen’s custom and semi-custom window treatments from design professionals at 5 p.m. June 9 at 325 Corte Madera Town Center in Corte Madera. 415-924-857 or www.ethanallen.com.

• Find the right drought-tolerant groundcovers, trees, succulents and California natives for your garden with help from Sloat Garden Center in a WaterWise seminar at noon June 7 at 401 Miller Ave Mill Valley 388-0365; June 9 at 2000 Novato Blvd. Novato (415-897-2169); and June 10 at 700 Sir Francis Drake Blvd. Kentfield (415-454-0262). Pre-registration required. Free for members. www.sloatgardens.com.

• Kids can build a trophy-shaped cell phone holder for a Father’s Day present from 9 a.m. to noon June 4 at Home Depot at 111 Shoreline Parkway in San Rafael (415-458-8675). www.homedepot.com. Free. Kit, apron, pin and certificate available while supplies last.

PJ Bremier writes on home, garden, design and entertaining topics every Saturday and also on her blog at DesignSwirl.co. She may be contacted at P.O. Box 412, Kentfield 94914, or at pj@pjbremier.com.